Finding the Fourth Proportional to 124,766.16, 172,128.42 and 76,936.48

Step by Step Solution

1. Step 1: Write the proportion equation
   124,766.16 : 172,128.42 = 76,936.48 : x
2. Step 2: Convert to fraction form
   124,766.16/172,128.42 = 76,936.48/x
3. Step 3: Cross multiply
   124,766.16x = 172,128.42 × 76,936.48
4. Step 4: Simplify right side
   124,766.16x = 13,242,954,742.76
5. Step 5: Solve for x
   x = 13,242,954,742.76/124,766.16
6. Step 6: Final answer
   x = 106,142.20